Collar locking device



Aug. 25, 1936. J, J ROSE 2,051,899

COLLAR LOCKING DEVICE Filed May 7, 1934 INI/ENTOR JOHN d. Ros

BY/ma Z :i

.47' RNEYS Patented Aug. 25, 1936 UNITED STATES PATENT OFFICE COLLAR LOCKING John J. 'Rosa v Dayton, Ohio Application May 7, 1934, Serial No. 724,378

1 Claim.

(Granted under the act of March 3, 1883, amended April 30, k1928; 370 O. G. 757) The invention described herein may be manufactured and used by or for the Governmentrfor governmental purposes, without the payment to me of any royalty thereon.

It is a principal object of my invention to provide a simple and positive means for locking two members against movement .relative to their common axis.

Further, my invention is sol constructed and arranged that said locking means isv readily secured to or detached from one of said movable members, prior to xity of both of said members relative to their common axis.

Another object of my invention is to provide a .l means which can be conveniently locked or unlocked in a simple manner without special tools or the displacement or replacement of parts'during the aforesaid operations.

My invention provides the added advantage of oiering. in the unlocked position, free access to the ready adjustment of said two members relative to their common axis.

With the foregoing and other objects in view, which will appear as the description proceeds, 25 the invention consists of certain new and novel improvementsv in locking devices, which will be hereinafter more fully illustrated and described in the accompanying drawing and more particularly pointed out in the appended claims. 30 Referring to the drawing, in which numerals of like character'designate similar parts .throughout the several'claims:

Fig. 1 is a side view, in perspective, of my' invention applied to an internal combustion engine spark plug.

In Fig. 1, a terminal I of aradio shielding 2 is provided at its open end with an outwardly turned ange 3. An internally threaded collar l is provided with an inwardly turned flange 5, 4" adapted to operatively engage the flange 3, land with a conical outwardly turned ange 6 provided with longitudinally disposed grooves 1.

' Attachment of the shielding 2 is accomplished by screwing of the collar 4 down upon a thread 4" provided upon the body portion of a spark-plug 8 until the bottom of the terminal I is slecurely pressed against' the top of said -body portion.

Disengagement of the aforesaid members is' prevented through employment of a locking device 9. The locking device 9 is in substance -a bail composed of a bowed centralportion I0 terminating in two parallel arms II, disposed normal to the plane of the bow. The open ends of the arms II terminate in two inwardly turned and oppo- 55 sitely disposed trunions I2, adapted to pivot within retaining holes I3 provided in a hexagonal raised portion ,I of the spark-plug 8.

respond to like diameters shown in Fig. l.

The operation of myinvention is' as follows. Assuming previous attachment of the .sparkl0 plug and cable to an internal combustion engine; the assembled terminal I, radio shielding 2 and collar 4 are slipped over the free end of the aforesaid cable and made fast to the body portion of the spark-plug 8 by screwing the collar I firmly in place. 'I'he locking device 9 is next raised from the phantom position shown in Fig. 1 and the parallel arm's II snapped into the rst grooves 1 coinciding therewith. It will be noted that the conical taper of theflange 6 materially assists 20 upward travel of the parallel arms Il. The necessary give" to accomplish the aformentioned "snapping action is furnished by the bowed central portion of the locking device 9. The parallel arms II are also provided with sufficient initial ,cant,I at their lower extremities to assure that there will be no tendency 0f the trunnions I2 to free themselves from their retaining holes I3, even when the knee junctions of the parallel arms II and bowed central portion II) are expanded outwardly to disengage the parallel arms II from the grooves 1, as shown in Fig. 1. The locking device 9 may be readily removed, in the event replacement is desired through outward disengagement of the trunnions I2 from their 35 retaining holes I3.

I claim?A In combination with a conduit having a terminal provided with an outwardly turned flange, a threaded collar freely slidably mounted upon said 40 conduit terminal having an outwardly turned flange provided with a plurality of oppositely and longitudinally disposed grooves, a body portion with threaded end adapted to receive and hold saidv threaded collar and attached conduit and having oppositely disposed holes perpendicular to the outer surface of saidbody portion',

and a yoked one-piece bail having its open ends inwardly turned for pivotally engaging said body portion holes and its central `portion disposed normal toits arms which are adapted to springingly engage and hold one pair of said longitudinal grooves.

JOHN J. ROSE.

Cil 

